Thonguthai, S., Thongsawat, P., Hyuduang, K., Sundokmai, T., & Lumrod, E. (2020). The Automatic Spring Mold Feeder Device. Vocational Education Central Region Journal, 4(1), 34–42. retrieved from https://so06.tci-thaijo.org/index.php/IVECJournal/article/view/242545